Free speakers, expensive contents
An electrical fault sends Charlie and Dee shopping. Their found speakers contain cocaine belonging to the mob.
Supporting source ↗CASE FILE · S03 E12
The Gang Gets Whacked: Part 1
S03 E12Photograph not available
A misunderstanding with the mob over a set of speakers and a stash of cocaine prompts Dennis to hire himself out as a male escort. It's that, or he and the rest of the gang will get whacked.
THE SHORT VERSION · SPOILERS AHEAD
INSIDE THE CASE.
A disastrous sale
Bingo pays $300 for drugs the collectors value at $25,000. The gang buys pills and heads to Frank’s old club to raise repayment money.
Supporting source ↗A diversion at the stables
Charlie visits a white horse and meets Buster. Meanwhile, the others circulate through the club in their borrowed air of respectability.
Supporting source ↗Different escape routes
Frank recruits Dennis for paid companionship. Left behind after the club visit, Mac asks to join the collectors and receives a bathroom-cleaning assignment.
Supporting source ↗THE EVIDENCE
THINGS IN THIS EPISODE.
Characters
Charlie Kelly180 other recorded episodes
Charlie raises his hand beside the white horse.Source ↗
Dee Reynolds179 other recorded episodes
Dee helps Charlie unpack the speakers.Source ↗
Dennis Reynolds176 other recorded episodes
Dennis recoils during the electrical repair attempt.Source ↗
Frank Reynolds171 other recorded episodes
Frank arrives at the club in a captain’s hat.Source ↗
Character groups
The mob crew1 other recorded episode
Three collectors confront Mac and Dennis outside Paddy’s.Source ↗
Locations
Country clubsOnly recorded here so far
The gang arrives in coordinated smart clothes.Source ↗
Paddy’s Pub147 other recorded episodes
The gang gathers around the pool table to discuss its next move.Source ↗
Objects
Circuit breakersOnly recorded here so far
The electrical panel sparks during Dennis’s attempted repair.Source ↗
Pool table12 other recorded episodes
Pool balls and cues cover the table during the discussion.Source ↗
Range Rover19 other recorded episodes
Dennis and Frank sit in the Range Rover before leaving Mac behind.Source ↗
Schemes
Dennis’s escort business1 other recorded episode
Dennis starts meeting wealthy women as a paid companion.Source ↗
Drug dealing1 other recorded episode
Charlie uses elaborate euphemisms to offer Bingo the drugs.Source ↗
Costumes
Nautical outfits4 other recorded episodes
Frank wears a white captain’s hat with his club outfit.Source ↗
Tracksuits5 other recorded episodes
The collectors wear dark tracksuits with contrasting trim.Source ↗
FOLLOW THE THREAD
CONNECTED EPISODES.
S03 E13 Connected through Dennis’s escort business, Drug dealing, Horses and 9 more.
S02 E10 Connected through Speakers, Paddy’s Pub, Frank Reynolds and 4 more.
S10 E06 
Connected through Nautical outfits, Range Rover, Paddy’s Pub and 5 more.
S07 E11 
Connected through Tracksuits, Range Rover, Paddy’s Pub and 5 more.
SOURCES & NOTES.
Tags document researched occurrences, not every appearance. Read the research notes and attribution.